A rudimentary classical procedure is described for evaluating each chemical element’s waveform (i.e., vacuum) density ρvac. The values sum up to = 2.6089 x 10-39 g/cm3 and yield the cosmological constant = 4.8675 10-66 cm-2. These values come well below the respective observational upper bounds and add to the volume of quantitative evidence in support of material vacuum comprising exclusively atomic electromagnetic radiations of the chemical elements.